2011

Table Of Contents
The time range (start, end) of the render layer composition is then set to the
union of its render pass compositions time ranges.
Render Layer Composition Update
A render layer composition is updated when a new pass is added to the scene.
Deleting a pass will not trigger an update because it's non-destructive.
Renaming a pass is equivalent to adding a new pass.
The working version of the render layer composition is backed up if you set
the Backup Version option. Then, in Update mode, the working version is
updated. otherwise it is recreated from scratch (Recreate mode).
Updating the render layer composition is then quite straightforward. Existing
render pass anchor link nodes are left unchanged because they point to the
latest version of the render pass composition by default. The ones that are
missing are created (but are unconnected) and linked to their respective render
pass compositions.
If an existing render pass is no longer in the render layer (which could be
because it was removed from the 3D scene or because the pre-comp file update
is partial), its anchor link node is not deleted; the render layer composition
update is non-destructivesee
Non-Destructive Updates on page 314.
The format and rate of a render layer composition is not modified on update.
However, the start/end of the render layer composition is updated to be the
union of its current time range and the time ranges of all its linked render
pass compositions.
Scene Compositions
Scene Composition Creation
Before the scene composition is created, render layer compositions in the
scene composition are created or updated.
With a Template If a template is specified for the scene, its content is copied
into the scene composition and the rest of the operations applied to it are
quite similar to what happens during an update of the scene.
The dependency graph is reviewed to find all the render layer anchor link
nodes which are updated to link to their associated render layer composition,
which was previously created or updated.
Scene Compositions | 317